JPH11262023A - Color suppression circuit - Google Patents

Color suppression circuit

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Publication number
JPH11262023A
JPH11262023A JP5816398A JP5816398A JPH11262023A JP H11262023 A JPH11262023 A JP H11262023A JP 5816398 A JP5816398 A JP 5816398A JP 5816398 A JP5816398 A JP 5816398A JP H11262023 A JPH11262023 A JP H11262023A
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Prior art keywords
color
gain
circuit
luminance
white balance
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JP5816398A
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Japanese (ja)
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JP3490888B2 (en
Inventor
Shinji Ukita
真二 浮田
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Sanyo Electric Co Ltd
三洋電機株式会社
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Priority to JP05816398A priority Critical patent/JP3490888B2/en
Publication of JPH11262023A publication Critical patent/JPH11262023A/en
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Publication of JP3490888B2 publication Critical patent/JP3490888B2/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/73Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control
    • H04N9/735Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control for picture signal generators

Abstract

PROBLEM TO BE SOLVED: To provide a color suppression circuit by which a color suppression characteristic with a satisfactory high luminance part is obtained with respect to a color temperature change.
SOLUTION: Based on an output from a CCD element 1, a luminance signal Y1 is extracted from an MTX circuit 5. Then a white balance control circuit 11 extracts R gain and B gain of white balance information, and a luminance color gain conversion circuit 13 gives a control signal for controlling a color gain of a high luminance part to a color suppression circuit 10 to obtain satisfactory color suppression characteristic of a high luminance part with respect to color temperature change.
COPYRIGHT: (C)1999,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は色抑圧回路に関し、特に、補色の色フィルタを持つCCD撮像素子を用いたスチルカメラにおいて、素子から出力された信号の高輝度部分を抑圧できるような色抑圧回路に関する。 Relates TECHNICAL FIELD The present invention relates to a color suppression circuit, in particular, in a still camera using a CCD imaging device having a complementary color filter, color suppression, such as can suppress high-luminance portion of the signal outputted from the device It relates to a circuit.

【0002】 [0002]

【従来の技術】補色の色フィルタを持つCCD素子には、図3(a)または(b)に示すように、4種類の補色(イエロー(Ye),シアン(Cy),グリーン(G BACKGROUND OF THE INVENTION CCD element having a complementary color filter, as shown in FIG. 3 (a) or (b), 4 kinds of complementary colors (yellow (Ye), cyan (Cy), green (G
r),マゼンタ(Mg))の色フィルタが配列されている。 r), the color filter of magenta (Mg)) are arranged.

【0003】図4は図3に示した補色フィルタの配列されたCCD素子を用いたスチルカメラのブロック図である。 [0003] FIG. 4 is a block diagram of a still camera using an array of CCD elements of the complementary color filter shown in FIG. 図4において、CCD素子1の出力信号は相関2重サンプリング回路(以下、CDS回路)2に与えられてノイズが低減され、その後A/D変換器3によって10 4, the output signal of the CCD 1 are correlated double sampling circuit (hereinafter, CDS circuit) given in 2 noise is reduced, by subsequent A / D converter 3 10
ビットのディジタル信号に変換される。 It is converted into a digital signal of the bit. 単板式カメラの場合、A/D変換器3から出力された信号は画素補間回路4に与えられてすべての画素位置に4つの補色信号Y For single-plate camera, A / D converter 3 signals output from four to all pixel positions given to the pixel interpolation circuit 4 of the complementary color signals Y
e,Cy,Mg,Grが作成された後、10ビットデータとしてマトリックス(以下、MTXと称する)回路5 e, Cy, Mg, after Gr is created, the matrix as a 10-bit data (hereinafter, referred to as MTX) circuit 5
に与えられ、次の第(1a),(1b),(1c)式で示されるY1,CR,CBの3信号が作成される。 Given, the following first (1a), (1b), (1c) 3 signals Y1, CR, CB of the formula is prepared.

【0004】 Y1=Ye+Mg+Cy+Gr(=2r+3g+2b)…(1a) CR=(Ye+Mg)−(Cy+Gr)(=2r−g)…(1b) CB=(Mg+Cy)−(Gr+Ye)(=2b−g)…(1c) 次に、これらの3信号はMTX回路6に与えられ、次の第(2a),(2b),(2c)式によりr,g,bに変換される。 [0004] Y1 = Ye + Mg + Cy + Gr (= 2r + 3g + 2b) ... (1a) CR = (Ye + Mg) - (Cy + Gr) (= 2r-g) ... (1b) CB = (Mg + Cy) - (Gr + Ye) (= 2b-g) ... ( 1c) next, these three signals are provided to the MTX circuit 6, the following first (2a), (2b), is converted r, g, and b by (2c) equation.

【0005】 r=0.1(Y1+4CR−CB) …(2a) g=0.1(2Y1−2CR−2CB)…(2b) b=0.1(Y1−4CR+CB) …(2c) 変換されたr,g,b信号はホワイトバランス回路7に与えられる。 [0005] r = 0.1 (Y1 + 4CR-CB) ... (2a) g = 0.1 (2Y1-2CR-2CB) ... (2b) b = 0.1 (Y1-4CR + CB) ... (2c) is converted r, g, b signals are applied to the white balance circuit 7. ホワイトバランス回路7にはホワイトバランス制御回路11からRゲインとBゲインとが与えられており、ホワイトバランス回路7はこれらのRゲインとr信号とを乗算し、Bゲインとb信号とを乗算することによってホワイトバランス補正を行ない、第(3a), The white balance circuit 7 is given a and R gain and B gain from the white balance control circuit 11, a white balance circuit 7 multiplies the these R gain and r signal, multiplying the B gain and b signals It performs white balance correction by, first (3a),
(3b),(3c)式で示すRGB信号を出力する。 (3b), and outputs the RGB signal shown in (3c) equation.

【0006】R=Rゲイン×r…(3a) G=g …(3b) B=Bゲイン×b…(3c) なお、RGB信号はホワイトバランス回路7でフルスケール10ビットにオーバフロークリップされてからガンマ補正回路8に与えられ、0.45乗の階調補正が施されて8ビットデータとなる。 [0006] R = R gain × r ... (3a) G = g ... Note (3b) B = B gain × b ... (3c), RGB signals from being overflowed clipped to a full-scale 10-bit white balance circuit 7 given to the gamma correction circuit 8, becomes 8-bit data is subjected to 0.45 square gradation correction. すなわち、 R′=255×(R/1023)∧0.45…(4a) G′=255×(G/1023)∧0.45…(4b) B′=255×(B/1023)∧0.45…(4c) ホワイトバランス制御回路11はR,G,Bの各データについて画面内平均値sumR,sumG,sumBを計算し、sumR=sumG、かつ、sumB=sum That, R '= 255 × (R / 1023) ∧0.45 ... (4a) G' = 255 × (G / 1023) ∧0.45 ... (4b) B '= 255 × (B / 1023) ∧0 .45 ... (4c) white balance control circuit 11 calculates R, G, screen average value for each data B sumR, sumG, the sumB, sumR = sumG and,, sumB = sum
GとなるようにRゲイン,Bゲインをホワイトバランス回路7の乗算器にフィードバックする。 R gain such that G, feeds back the B gain to the multiplier of the white balance circuit 7. ガンマ補正回路8でガンマ補正された後の原色信号R′,G′,B′はマトリックス回路9に入力され、次の第(5a),(5 Primary color signals after the gamma correction in the gamma correction circuit 8 R ', G', B 'are input to the matrix circuit 9, the following first (5a), (5
b),(5c)式により輝度信号Yおよび色信号U,V b), the luminance signal Y and the chrominance signal U by (5c) Formula, V
に変換される。 It is converted to.

【0007】 Y=0.299R′+0.587G′+0.114B′ …(5a) U=−0.1684(R′−G′)+0.5(B′−G′)…(5b) V=0.5(R′−G′)−0.0813(B′−G′) …(5c) ここで、高輝度被写体に対しては、CCD素子1の出力が4補色とも飽和し、10ビットのA/D変換器3を用いた場合、Ye=Cy=Mg=Gr=1023となるため、第(1)式〜第(5)式から各信号量を算出すると、 CR=CB=0 …(6) Y1=4092、r=b=409、g=818…(7) 仮に、ホワイトバランス制御回路11の与えるホワイトバランス補正値が Rゲイン=2、Bゲイン=2 …(8) とすれば、 R=G=B=818、R′=G′=B′=231、Y= [0007] Y = 0.299R '+ 0.587G' + 0.114B '... (5a) U = -0.1684 (R'-G') + 0.5 (B'-G ') ... (5b) V = 0.5 (R'-G ') - 0.0813 (B'-G') ... (5c) where, for a high-luminance subject, the output of the CCD 1 is saturated with 4 complementary, 10-bit when using the a / D converter 3, since the Ye = Cy = Mg = Gr = 1023, calculating the respective signal value from equation (1), second (5), CR = CB = 0 ... (6) Y1 = 4092, r = b = 409, g = 818 ... (7) if, when the white balance correction value given by the white balance control circuit 11 is R gain = 2, B gain = 2 ... (8) , R = G = B = 818, R '= G' = B '= 231, Y =
231、U=V=0 となり、この部分は無色となる。 231, U = V = 0, and this portion becomes colorless.

【0008】一方、補色フィルタの分光特性は、図5に示すように通常の白色光(色温度5500K)による照明で白被写体を撮像したときに第(6)式で示したように、CR=CB=0が成立するように決められている場合がほとんどである。 On the other hand, the spectral characteristics of the complementary color filter, as shown in equation (6) when capturing a white object in illumination by normal white light (color temperature 5500K) as shown in FIG. 5, CR = If CB = 0 are determined to stand it is almost. このとき、第(2)式より、 r=0.1Y1、g=0.2Y1、b=0.1Y1…(9) となるため、ホワイトバランス補正のための乗数は第(8)式の値となる。 At this time, than the equation (2), r = 0.1Y1, g = 0.2Y1, b = 0.1Y1 ..., and therefore (9), the multiplier first (8) values ​​for white balance correction to become.

【0009】以上のことから、色温度5500Kによる照明で白被写体を撮像したとき、Rゲイン=2、Bゲイン=2であれば非飽和部分,飽和部分ともに無色に再現される。 [0009] From the above, when capturing a white object in illumination by color temperature 5500K, the unsaturated moiety if R gain = 2, B gain = 2, is reproduced colorless saturated portion both.

【0010】 [0010]

【発明が解決しようとする課題】ここで、白熱電球(色温度2750K)による照明の場合を考えると、白色の非飽和被写体に対してr=g=818、b=205からホワイトバランス補正値がRゲイン=1,Bゲイン=4 BRIEF Problems to be Solved] Here, considering the case of illumination by incandescent bulbs (color temperature 2750K), white balance correction value from r = g = 818, b = 205 against a white desaturated subject R gain = 1, B gain = 4
となる。 To become. しかし、4補色とも飽和している部分は、色温度5500Kの場合と同様に第(6)式および第(7) However, a portion all four complementary colors are saturated, the (6) as in the case of color temperature 5500K formula and the (7)
式が成立するため、ホワイトバランス補正後は、 R=1×409=409、G=818、B=4×409 Since the expression is satisfied, after the white balance correction, R = 1 × 409 = 409, G = 818, B = 4 × 409
=1023(オーバフロークリップのため) したがって、白熱電球の非飽和部分に正確にホワイトバランス補正を施すと、飽和部分は青緑の色付きを生じる。 = 1023 (for the overflow clip) Therefore, if subjected to the accurate white balance correction to the non-saturated portion of the incandescent light bulb, saturated portion results in a with a blue-green color. 逆に、晴天下の日陰(色温度11000K)のように、ホワイトバランス補正値がRゲイン=4、Bゲイン=1となる場合には、飽和部分におけるホワイトバランス出力がR=1023,G=818,B=409となるため、黄赤色の色付きを生じる。 Conversely, as in the shade under a clear sky (color temperature 11000K), when the white balance correction value is R gain = 4, B gain = 1, white balance output in the saturation portion is R = 1023, G = 818 , since the B = 409, resulting in with a yellow-red color.

【0011】この問題を解決するために、従来から高輝度部分に対して図4に示すように色抑圧を働かせる色抑圧回路10と輝度・色ゲイン変換回路12とが設けられている。 [0011] To solve this problem, a color suppression circuit 10 exerts a color suppression as shown in FIG. 4 conventionally for the high luminance portion and the luminance and color gain conversion circuit 12 is provided. 輝度・色ゲイン変換回路12は輝度信号Y1に基づいてUV(または変調色信号)の乗数または増幅器のゲインを色抑圧回路10に設定する。 The luminance and color gain conversion circuit 12 sets the gain of the multiplier or amplifier of UV (or modulated color signal) to a color suppression circuit 10 based on the luminance signal Y1. しかし、この動作だけでは幅広い色温度範囲に対応して良好に抑圧することができない。 However, it can not be satisfactorily suppressed in response to this operation wide color temperature range only. つまり、上述のごとく、色温度275 That is, as described above, the color temperature of 275
0Kおよび11000Kに対する抑圧効果を十分確保しようとすれば5500Kでは過抑圧となり、ダイナミックレンジを損なってしまうという問題がある。 If the suppression effect on 0K and 11000K attempts sufficiently ensured becomes 5500K in excessive suppression, a problem that impairs the dynamic range.

【0012】それゆえに、この発明の主たる目的は、色温度変化に対して良好な高輝度部分の色抑圧特性が得られるような色抑圧回路を提供することである。 [0012] It is another object of the present invention is to provide a color suppression circuit such as a color suppression characteristic of a good high-luminance part with respect to a color temperature variation is obtained.

【0013】 [0013]

【課題を解決するための手段】請求項1に係る発明は、 Means for Solving the Problems The invention according to claim 1,
各画素に対してYe,Cy,Gr,Mgの4種類の補色の色フィルタが配列されたCCD撮像素子を用いたスチルカメラにおける色抑圧回路であって、CCD撮像素子から出力された信号に処理を施して輝度信号およびホワイトバランス情報を抽出する信号抽出手段と、抽出された輝度信号とホワイトバランス情報とに基づいて、CC Ye for each pixel, Cy, Gr, a color suppression circuit in still camera using the 4 types of the CCD image sensor complementary color filters are arranged in Mg, processing of the signal outputted from the CCD image sensor on the basis of the signal extracting means for extracting a luminance signal and the white balance information, the extracted luminance signals and the white balance information is subjected to, CC
D素子から出力された信号の高輝度部分の色ゲインを制御して色温度変化に対して良好な高輝度部分の色抑圧特性を得るための抑圧手段とを備えて構成される。 Constructed and a suppression means for obtaining a color suppression characteristic of a good high-luminance part with respect to change in color temperature by controlling the color gain of the high luminance portion of the signal output from the D element.

【0014】 [0014]

【発明の実施の形態】図1はこの発明の一実施形態のブロック図である。 Figure 1 DETAILED DESCRIPTION OF THE INVENTION is a block diagram of an embodiment of the present invention. 図1において、この発明の一実施形態においては、色抑圧回路10は色温度5500Kでの抑圧が不要であり、色温度が5500Kから離れるほど必要となることに着目し、抑圧特性をホワイトバランス補正値に連動するように構成したものである。 In Figure 1, in one embodiment of the invention, the color suppression circuit 10 is unnecessary suppression of the color temperature 5500K, paying attention to the color temperature is required increasing distance from 5500K, white balance correction and suppression characteristic those configured to work in value.

【0015】すなわち、輝度・色ゲイン変換回路13には、MTX回路5から輝度信号Y1が与えられるとともに、ホワイトバランス制御回路11からホワイトバランス情報Rゲイン,Bゲインが与えられる。 [0015] That is, the luminance and color gain conversion circuit 13, together with the luminance signal Y1 is applied from MTX circuit 5, the white balance information R gain from the white balance control circuit 11, B gain is given. そして、輝度・色ゲイン変換回路13は輝度信号Y1とホワイトバランス情報Rゲイン,Bゲインとに基づいて色抑圧回路1 The luminance and color gain conversion circuit 13 color suppression circuit 1 on the basis of the white balance information R gain and luminance signals Y1, in the B gain
0の色ゲインを制御することにより、色抑圧回路10では色温度変化に対して良好な高輝度部分の色抑圧特性を得ることができる。 By controlling the color gain of 0, it is possible to obtain a color suppression characteristic of a good high-luminance part the color in the color suppression circuit 10 a temperature change.

【0016】輝度・色ゲイン変換回路13は、輝度信号Y1とホワイトバランス情報Rゲイン,Bゲインを入力としてUVゲインを出力とする一種のテーブルまたは計算式であり、実際のCCD素子1の出力によって決定される。 The luminance and color gain conversion circuit 13, the luminance signal Y1 and the white balance information R gain is a type of table or calculation formula and outputs the UV gain B gain as an input, the actual output of the CCD 1 It is determined.

【0017】図2は輝度・色ゲイン変換部13による変換特性の一例を示す図である。 [0017] FIG. 2 is a diagram showing an example of conversion characteristic by the luminance and color gain conversion section 13. 図2において、Rゲイン=Bゲイン=2のとき、つまり色温度5500Kのときほとんどすべての輝度に対してUVゲイン=1としてある。 2, when the R gain = B gain = 2, i.e. there as UV gain = 1 for almost all of the luminance when the color temperature 5500K. 色温度が5500Kから離れた場合、その度合をr If the color temperature is away from 5500K, the degree of r
atioというパラメータを用いて計算している。 It is calculated using a parameter called atio.

【0018】ratio=MAX(Rゲイン/2,Bゲイン/2) (ただし、MAX(a,b)は、a,bのうちの大きい方を選択する関数) ratio=1のとき、図2のゼロクロス点はY1=1 The ratio = MAX (R Gain / 2, B Gain / 2) (where, MAX (a, b) is, a, a function for selecting the larger of the b) when the ratio = 1, in Figure 2 the zero-crossing point Y1 = 1
023,ratio=2のときゼロクロス点はY1=7 023, the zero-crossing point when the ratio = 2 is Y1 = 7
67とし、1から2の間は線形内挿補間される。 And 67, between 1 and 2 is between linearly in interpolation.

【0019】 [0019]

【発明の効果】以上のように、この発明によれば、CC As it is evident from the foregoing description, according to the present invention, CC
D撮像素子から出力された信号に処理を施して輝度信号およびホワイトバランス情報を抽出し、これらの信号に基づいて高輝度部分の色ゲインを制御することによって、色温度変化に対して良好な高輝度部分の色抑圧特性を得ることができる。 Extracting a luminance signal and a white balance information is subjected to processing on the signal outputted from the D imaging element, by controlling the color gain of the high brightness portion based on these signals, the high good for the color temperature change it is possible to obtain color suppression characteristic intensity part.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明の一実施形態のブロック図である。 1 is a block diagram of an embodiment of the present invention.

【図2】図1に示した輝度・色ゲイン変換回路13による変換特性を示す図である。 It is a diagram illustrating a conversion characteristic according to Figure 2 the luminance and color gain conversion circuit 13 shown in FIG.

【図3】補色フィルタの配列を示す図である。 3 is a diagram showing an arrangement of complementary color filters.

【図4】図3に示した補色フィルタの配列されたCCD [Figure 4] arrayed CCD complementary color filter shown in FIG. 3
素子を用いたスチルカメラのブロック図である。 It is a block diagram of a still camera using the device.

【図5】補色フィルタの分光特性を示す図である。 5 is a diagram showing the spectral characteristics of the complementary color filter.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 CCD素子 2 CDS回路 3 A/D変換器 4 画素補間回路 5,6,9 MTX回路 7 ホワイトバランス回路 8 ガンマ補正回路 10 色抑圧回路 11 ホワイトバランス制御回路 12,13 輝度・色ゲイン変換回路 1 CCD element 2 CDS circuit 3 A / D converter 4 pixel interpolation circuit 5, 6, 9 MTX circuit 7 white balance circuit 8 gamma correction circuit 10 color suppression circuit 11 white balance control circuits 12 and 13 the luminance and color gain conversion circuit

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【手続補正書】 [Procedure amendment]

【提出日】平成11年3月23日 [Filing date] 1999 March 23,

【手続補正1】 [Amendment 1]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】特許請求の範囲 [Correction target item name] the scope of the appended claims

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【特許請求の範囲】 [The claims]

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 各画素に対してYe,Cy,Gr,Mg 1. A Ye for each pixel, Cy, Gr, Mg
    の4種類の補色の色フィルタが配列されたCCD撮像素子を用いたスチルカメラにおける色抑圧回路であって、 前記CCD撮像素子から出力された信号に処理を施して輝度信号およびホワイトバランス情報を抽出する信号抽出手段、および前記信号出力手段によって抽出された輝度信号とホワイトバランス情報とに基づいて、前記CC A color suppression circuit in still camera using the 4 types of the CCD image sensor complementary color filters are arranged in the extracted luminance signals and the white balance information is subjected to processing on a signal output from the CCD image sensor signal extracting means for, and on the basis of the luminance signal extracted and white balance information by said signal output means, the CC
    D素子から出力された信号の高輝度部分の色ゲインを制御して色温度変化に対して良好な高輝度部分の色抑圧特性を得るための抑圧手段を備えた、色抑圧回路。 With a suppression means for obtaining a color suppression characteristic of a good high-luminance part with respect to change in color temperature by controlling the color gain of the high luminance portion of the signal output from the D elements, color suppression circuit.
JP05816398A 1998-03-10 1998-03-10 Color suppression circuit Expired - Fee Related JP3490888B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05816398A JP3490888B2 (en) 1998-03-10 1998-03-10 Color suppression circuit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP05816398A JP3490888B2 (en) 1998-03-10 1998-03-10 Color suppression circuit
US09/263,596 US6650363B1 (en) 1998-03-10 1999-03-05 Color suppression circuit and electronic camera using it
KR10-1999-0007821A KR100529259B1 (en) 1998-03-10 1999-03-09 Color-suppression circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6724934B1 (en) 1999-10-08 2004-04-20 Samsung Electronics Co., Ltd. Method and apparatus for generating white component and controlling the brightness in display devices

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3663973B2 (en) * 1999-05-06 2005-06-22 日本電気株式会社 Image signal processing device and image signal processing method
US7330209B2 (en) * 1999-12-20 2008-02-12 Texas Instruments Incorporated Digital still camera system and complementary-color-filtered array interpolation method
AT553596T (en) * 2000-06-29 2012-04-15 Koninkl Philips Electronics Nv Color imaging device
JP4153715B2 (en) * 2002-04-08 2008-09-24 松下電器産業株式会社 A video signal processing apparatus and a video signal processing method
JP4789140B2 (en) * 2005-05-19 2011-10-12 株式会社メガチップス Image processing apparatus
JP5589446B2 (en) * 2009-09-18 2014-09-17 ソニー株式会社 The image processing apparatus, an imaging apparatus, image processing method, and program

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6235792A (en) 1985-08-09 1987-02-16 Hitachi Ltd Adjustment system for white balance
JPH02104186A (en) 1988-10-13 1990-04-17 Sanyo Electric Co Ltd Signal processing circuit for video camera
JP2714248B2 (en) 1990-11-01 1998-02-16 キヤノン株式会社 An image pickup apparatus having a gradation control function
DE69315285T2 (en) * 1992-09-02 1998-05-28 Matsushita Electric Ind Co Ltd An apparatus for processing an image signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6724934B1 (en) 1999-10-08 2004-04-20 Samsung Electronics Co., Ltd. Method and apparatus for generating white component and controlling the brightness in display devices
US6876764B2 (en) * 1999-10-08 2005-04-05 Samsung Electronics Co., Ltd. Method and apparatus for generating white component and controlling the brightness in display devices

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KR100529259B1 (en) 2005-11-17
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JP3490888B2 (en) 2004-01-26

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